MESON Chess Problem Database

Problem Display
PID: 144031 (Bbq1r3/B4R1Q/7p/3rpN2/2P4P/2N1Pk1K/2P3R1/8 w - - 0 1)

Gugel, Lev Nikolaevich

Shipov, V

Magyar Sakkvilag, 1930

Bbq1r3/B4R1Q/7p/3rpN2/2P4P/2N1Pk1K/2P3R1/8

#2

12 + 7

1101 BCSC Final 2011-2012
15 British Chess Magazine 2012
56 The Problemist 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf5+
      • 2.Rxf5#
      • 2.Qxf5#
    • 1...Qa6
      • 2.Sd6#
    • 1...Qb7
      • 2.Se7#
    • 1...Qc6
      • 2.Sd6#
    • 1...Qc7
      • 2.Se7#
    • 1...Qd8
      • 2.Se7#
    • 1...h5
      • 2.Qxh5#
  • Tries
    • 1.Sb1?
      • threat
        • 2.Sd2#
      • 1...Qxf5+
        • 2.Qxf5#
      • 1...Ke4
        • 2.Sd2#
        • 2.Bxd5#
      • 1...Qb7
        • 2.Se7#
      • 1...Qc6
        • 2.Sd6#
      • 1...e4!
    • 1.Qg6?
      • threat
        • 2.Qh5#
        • 2.Qg3#
        • 2.Qg4#
      • 1...Qxf5+
        • 2.Rxf5#
        • 2.Qxf5#
        • 2.Qg4#
      • 1...Qxc4
        • 2.Qg3#
      • 1...e4
        • 2.Qh5#
        • 2.Qg4#
      • 1...h5
        • 2.Qxh5#
        • 2.Qg3#
      • 1...Rg8!
    • 1.Qg8?
      • threat
        • 2.Qg3#
        • 2.Qg4#
      • 1...Qxf5+
        • 2.Rxf5#
        • 2.Qg4#
      • 1...Qxc4
        • 2.Qg3#
      • 1...e4
        • 2.Qg4#
      • 1...h5
        • 2.Qg3#
      • 1...Rxg8!
    • 1.Qg7?
      • threat
        • 2.Qg3#
        • 2.Qg4#
      • 1...Qxf5+
        • 2.Rxf5#
        • 2.Qg4#
      • 1...Qxc4
        • 2.Qg3#
      • 1...e4
        • 2.Qg4#
      • 1...h5
        • 2.Qg3#
      • 1...Rg8!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sd2#
      • 1...Qxf5+
        • 2.Qxf5#
      • 1...Kxe4
        • 2.Bxd5#
      • 1...Qb7
        • 2.Se7#
      • 1...Qc6
        • 2.Sfd6#
      • 1...Rd2
        • 2.Sxd2#
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(f);N_PINS(H)::R(J)+S(H)
    • Q(f);N_PINS(H),N_SPINR(b)::R(J)+S(H)
    • P(d);OGATE::QAB(K),XP(d)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • Q(f);CHECK,OGATE,P_SPINQ(f),XS(H)::QAR2(K),XQ(f)
        • Q(f);N_PINS(H),N_SPINR(b)::R(J)+S(H)
      • Refutation
        • P(c);N_SPINR(b)
    • Try
      • Q(K);
      • Threat
        • DUALS(3)
      • Vars
        • Q(f);N_PINS(H),XP(F)::QAR1(K)
      • Refutation
        • R(g);
    • Try
      • Q(K);
      • Threat
        • DUALS(2)
      • Vars
        • Q(f);N_PINS(H),XP(F)::QAR1(K)
        • P(c);N_SPINR(b)::QAB1(K)
        • P(d);::QAR1(K)
      • Refutation
        • R(g);XQ(K)
    • Try
      • Q(K);
      • Threat
        • DUALS(2)
      • Vars
        • Q(f);N_PINS(H),XP(F)::QAR1(K)
        • P(c);N_SPINR(b)::QAB1(K)
        • P(d);::QAR1(K)
      • Refutation
        • R(g);
  • Actual
    • S(C);N_PINR(b)
    • Threat
      • S(C)
    • Vars
      • Q(f);CHECK,OGATE,P_SPINQ(f),XS(H)::QAR2(K),XQ(f)
      • K(a);OGATEB,P_SPINR(b),S_FLIGHT,XS(C)::B(L),XR(b)
      • Q(f);N_PINS(H)::R(J)+S(H)
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